This happened to me today while squatting. The standard broke, then the weight crashed to the floor and broke the plate in the middle. Lots of loud noise. I thought it was kind of cool. *edit: I should clarify. Most likely this had nothing to do with me squatting. It just happened to break while it was my turn. My lifting partner was going 495x5. I broke it, "he loosened it up", not to mention all of the other wear and tear.